Roller-mill for grinding ink



(No Model.)

P. LINDEMEYER, Jr. ROLLER MILL-FDR GRINDING INK, &c.

No.5'66,920. Patented Sept. l, 1896.

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| Mt Wt INVENTOF( wlTNgssEs y ggg UNITED STATES EEICE.

PATENT ROLLER-MILL FOR GRINDING INK, 86C.

SPECIFICATION forming part of Letters Patent No. 566,920, datedSeptember 1, 1896.

Application led February 10,1896. Serial No. 578,747. (No model.)

To a/ZZ whom, it may concern:

Be it known that I, PHILIP LINDEMEYER, J r., a resident ofthe city ofBaltimore, in the State of Maryland, have invented certain new anduseful Improvements in Roller-Mills for Grinding Ink and Like Purposes;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use the same.

The invention relates to roller-mills for grinding paint,inks,and otherlike substances, and its obj ect is to improve the efficiency anddurability of the doctors used in such mills and in other machinescomprising rollers that need to be scraped, thereby increasing theuniformity of the product and diminishing the number ofA grindingsnecessary and insuring other advantages; and the invention consists inthe construction hereinafter described and particularly pointed out.

In the accompanying drawings, Figure lis a partial vertical longitudinalsection of an ink-mill on line l 1 of Fig. 2. Fig. 2 is an endelevation, the rollers being omitted. Fig. 3 is a section of a detail,and Fig. 4t is a plan of another detail. Fig. 5 is an enlarged sectionof a detail.

Numeral 1 denotes grinding or crushing rollers to be driven in thedirection indicated by arrows by the usual or any convenient andsuitable mechanism.

2 denotes one of the plates used` in inkgrinding mills to prevent thematerials from spreading to and over the ends of the rollers.

3 denotes a doctor consisting of a plate having an edge contiguous theroller and adapted to scrape its surface to remove adherent material. Itis usual to make the upper edge of a discharge-chute 4 serve as adoctor, as represented in the present instance, though such constructionis not essential to the present improvement,which relates to the deviceconsidered as a scraping or cleaning plate and not to the functions of achute or spout.

In roller-mills for grinding ink and paint and in other machines usingrollers in contact with viscous substances it is necessary that materialadhering to the surface of one or more of the rollers be closely scrapedand removed therefrom by afplatelhaving. a thin or sharp edge bearingagainst the roller in manner to remove the sticky substance whichotherwise would remain adherent, become compacted and accumulatethereon, and particularly upon the last or discharge roller. It isdesirable that the edge of such scrapingplate be thin, and that its bodyalso should be-thin, to obviate as far as practicable the dullingthereof by mineral elements of the substances that are ground; but athin plate, preferable for the above reason, is liable to buckle andbecome distorted to such a degree as to interfere with its operation.III some cases more or less semihardened material or skins pass underthe edge of the scraper and accumulate in a hardened and compacted layeron the roller. The ends of the doctor are stiffened by end flanges orthe like or by their attachments to the frame and are more firmly heldand thus more continuously and efficiently remove the material near theends of the roller, which may be thereby kept comparatively clean. Theground material passing from them to the upper side of the doctor movesfreely in some cases than at intermediate points, with the effect tointerfere Y with the uniformity of the ground product, thereby renderingnecessary more regrinding to produce the best results than wouldotherwise be required. To overcome these and other evils, I providedoctor-staying fingers or bars 5 and support them in such manner thattheir ends bear on the doctor near its scraping edge in manner to holdit in close contact with the roller and to obviate buckling or bendingand to take o the adherent substances evenly across the entire length ofthe roller, thereby insuring even grinding and doing the work muchquicker. Intermediate these pressing-ngers and on the opposte side ofthe doctor and attached to its bottom are ties or tying-fingers 6,adapted to draw the doctor onto the roller. The fingers 5 may bevariously supported. In the instance shown they are made angular incrosssection and held in similarly-shaped holes in a detachable bar 7.Said bar is preferably bolted or screwedto the machine-frame and thescrews are situated in slots 8, which provide for the easy removal ofthe bar without the entire removal of the bolts. On the upper side ofthe bar are fixed channel wall-- plates 9. These plates have a Z form inIOO cross-section, being bent at 9 to overhang the long or lower part ofbutton 11 when the latter is suitably disposed, as shown in Fig. 5. Thischannel in the present instance is included between two Z-shaped plates9, fastened to the top of the bar 7. (See Figs. 1 and 4.) In the bar 7,at the bottom of the channel, are angular holes 7 to receivesimilarly-shaped fingers 5.

10 denotes thumb-screws, each connected with a finger 5, substantiallyas represented, so as to turn freely therein without turning the finger.

11 denotes a screw-threaded button adapted to be moved on the screw byturning the latter.. The ends of the button, when suitably adjusted,engage under the channelwalls 9, and by suitably operating the screwthey can be madeto press against the under surface of said walls'withthe effect to thrust the fingers', which are held against turning, downupon' the doctor, thereby holding its edge upon the roller. The smallupper part of the button 11 is a finger-piece for turning the button tomove it-from under the walls 9 when it is either desired to remove itscorresponding finger'or to lock it under said walls when inserted. Y Theupper part of the button 11 isin each of its dimensions less than thewidth of the opening at the top of the two plates 9',whileits lowerpart, which is also narrowerthansaid opening, is larger and issufficiently long when suitably turnedto'beh'eld under the overhangingparts of the Z- shaped plates, as indicated in- Fig. l. Each screw 10`can bescrewed through a button or nut 11 4to vertically adjust a finger5, said finger 5 and the screw being connected, as shown, to permit freerotation of the latter.

By the above-described construction the u-pper part of button 1 1 canjbemanipulated to turlr the longer part tofa position either pari allel'with or transverse to the plates-and to the opening between them,according as it is desired to engage said longer part of the but-V tonwith thev overhanging edges of the plate or not. v Said longer part ofthe'button,l being narrower than the opening,-can bepassed between andbelow the plate edges or removed when suitably turned for the purpose;

v Theiloc'al adhesion of skins or the accumulation of exceptionallyviscous or adherent material occurs,-for`eXa-mple, toward the time of1the passage of theremnants* of a charge, which remnants are heavy andimmobile. Such materialfalls behind that which is more fiu'idortractable and it requires frequently to be removed with a spatula or thelike operating near'the edge' of the doctor. To permit this, one or morefingers can be raised sufficiently for the purpose without disturbingothersjor releasing the'main part of the doctor. Itislpreferredtocombine with the platestaying fingers 5 thetying-fingers6. These may besecured in any convenient vmanner to the under side ofthe plate. In the presen-t instance these ends are pinned between earsmade fast on the plate. Their opposite ends are held in the slots 12 ofa bar 13, fixed to the frame by milled nuts 111, which can be screwed onthe ties and up against the bar with the effect to pull down the edge ofthe doctor. The ties 6 diminish the number of fingers 5 which wouldotherwise be necessary to lproduce the best effect, and to this extentthey facilitate the cleaning of the roller and plate in the manner justabove described, because fewer fingers have to be lifted for thepurpose. A good effect would be produced were either the fingers 5 orthe ties 6 used alone in suitable numbers, but the use of both has beenfound to work very successfully. In a mill having a roller thirty-eightinches long seven fingers and six ties will give good re suits. Theinvention isnot limited to the use of both the fingers and the ties, norto any particular number of either, and the means for holding,adjusting, and forcing these de vices home may be varied.

Having thus described my invention, what I claim is` 1. In a machine forgrinding viscous material or the like, the combination with a roller, ofa doctor and devices for holding the same intermediate its ends toobviate buckling or bending, said devices-being adjustable transverselyof the operative edge of the doctor and contiguous thereto,substantially as described. I

2. In a machine for grinding'viscousmaterial or thelike, thecombination'witharoller, of a doctor and devices for holding the sameintermediate its ends to obviatebucklin g or bend1ng,said devicesconsistingof removable fingers and means5 for applying them to thedoctor near its edge', substantially as described.

3. In a machine for grinding viscous material or the like, thecombination' with' a roller, of a doctor and devices for holding thesame intermediate its ends to obviate buckling or bendingaid devicesconsisting of separatelyremovable fingers and means for applying them tothe doctor near its edge, substantially as described. y A

4f. In-a machine for grinding viscousmaterial or the like, thecombination with a roller, of ado'ctor and devices forhoiding the sameintermediate its ends to obviate buckling or bending, said devicesacting upon opposite sides of thedoctor,\substantially as described.

5. The combination of Va roller, a doctor, fingers adapted to stay orhold the doctor and obviate its-bending or buckling, asupportin gbar toreceive the endsof said iingersand buttons or the like to lock thefingers in the bar and against the doctor, substantially as described. Q

6. The combination in a machine-for grindingw viscous material or thelike, of a roller, a doctor, fingers adapted to stay or hold the doctorand obviateits bending'or buckling, a

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1o bending, seid devices comprising tying-ngei's to draw the doctor uponthe roller, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing Witnesses.

PHILIP LINDEMEYER, J R.

Vitnesses:

ALBERT POPKINS, HARRY Y. DAVIS.

